71232811 has 16 divisors (see below), whose sum is σ = 79821280. Its totient is φ = 63141120.

The previous prime is 71232803. The next prime is 71232851. The reversal of 71232811 is 11823217.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71232811 - 2³ = 71232803 is a prime.

It is a super-2 number, since 2×71232811² = 10148226725923442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71232851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33055 + ... + 35143.

It is an arithmetic number, because the mean of its divisors is an integer number (4988830).

Almost surely, 2^71232811 is an apocalyptic number.

71232811 is a deficient number, since it is larger than the sum of its proper divisors (8588469).

71232811 is a wasteful number, since it uses less digits than its factorization.

71232811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206.

The product of its digits is 672, while the sum is 25.

The square root of 71232811 is about 8439.9532581644. The cubic root of 71232811 is about 414.5338764187.

The spelling of 71232811 in words is "seventy-one million, two hundred thirty-two thousand, eight hundred eleven".